When “Just Because” Isn’t Enough
Introduction
Every worldview has starting points, which are assumptions or foundations that shape how everything else is interpreted. These foundational beliefs are not always provable in the ordinary sense; they’re presupposed as fundamental truths.
But the real question is this: Are your starting points justified?
Many people claim to be rational, moral, or scientific; however, when pressed, their foundational beliefs rest on either vicious circularity or arbitrary assumptions. These are not minor errors; they are fatal cracks in the very structure of a worldview.
This post exposes why some foundational beliefs collapse under pressure and how to test whether a worldview is truly capable of supporting truth, logic, morality, and meaning.
What Is Vicious Circularity?
Definition: Vicious circularity occurs when someone uses a claim to prove itself, without any independent justification.
Example:
“I know science is the only way to know the truth, because science has shown us that.”
But that’s circular. You’re using science to prove science is the only valid method of knowing. What justifies that method to begin with?
Not all circularity is wrong; some circularity is unavoidable at the foundational level. Every worldview must appeal to its ultimate authority in some way. But there’s a difference between a necessary circle (a consistent foundation) and a vicious circle (an empty loop).
Vicious Circles Look Like This:
- “Reason is valid because it’s reasonable.”
- → Unjustified unless you can explain why reason is trustworthy in your worldview.
- “Morality matters because people feel that it does.”
- → Grounding objective morality in subjective feeling is arbitrary.
- “Truth is whatever works.”
- → But how do you determine what “works” without a standard for truth?
A worldview that starts and ends with itself without offering a reason to believe its foundation is trustworthy is epistemically empty. It can’t explain why its core commitments are actual—it just asserts them.
What Are Arbitrary Starting Points?
Definition: An arbitrary starting point is a belief accepted without reason, justification, or necessity.
Many people adopt foundational beliefs simply because:
- They sound good
- They feel right
- They’re culturally accepted
- They’re useful
But none of those make a belief true. Believing something because it’s popular or comforting doesn’t give it explanatory power.
Examples of Arbitrary Foundations:
- “We should treat everyone with dignity.”
- → Why? What is “dignity,” and what makes it binding if humans are just evolved animals?
- “Logic just is. We don’t need to justify it.”
- → If your worldview is materialistic, how do immaterial laws of logic exist and govern thought?
- “Science will eventually explain everything.”
- → That’s not a scientific claim—it’s a philosophical assumption that can’t be tested.
In each case, the foundation is accepted without any reason that flows from within the person’s worldview. It’s borrowed, assumed, or smuggled in.
The Pitfall of Unjustified Beliefs
A worldview with unjustified starting points has two problems:
- It can’t explain its foundations.
- It assumes things like logic, truth, morality, or identity without having the resources to explain them.
- It leads to selective borrowing.
- People will live as if things like morality, meaning, and truth are real, even when their worldview logically denies those things. That’s not coherence—it’s intellectual theft.
If your worldview doesn’t allow for objective morality, you can’t borrow it just because you like it.
The Christian Response: Justified Foundations
The biblical worldview uniquely avoids both vicious circularity and arbitrariness because:
- It starts with a self-existent, rational, moral God.
- Logic, truth, morality, and meaning are grounded in His unchanging nature.
- Human knowledge is possible because humans are made in God’s image.
- The Scriptures provide revelation from outside the system, not a closed circle.
Unlike other worldviews, Christianity can account for its foundations without appealing to blind faith or internal contradictions.
The Christian worldview is not circular; it is spiral—coherent, consistent, and explanatory, rising from God’s revelation to human understanding and back again.
Worldview Check: Is Your Foundation Justified?
Ask yourself:
- What is the foundation of my beliefs about truth, morality, and reason?
- Can my worldview explain why logic works?
- Do I believe things because they’re true, or just because they feel right?
- Am I borrowing values from a worldview I reject?
If your worldview relies on unjustified assumptions or vicious circles, it may be time to reconsider its foundation.
Next in the Series:
Part 4: Self-Refutation and the Death of Relativism
We’ll examine why certain popular beliefs—like “truth is relative” or “you can’t know anything for sure”—collapse by their own logic.